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相关概念视频

Potential Energy00:52

Potential Energy

37.4K
The energy stored by a structure and location of matter in space is called potential energy. For instance, raising a kettlebell changes its spatial location and increases its potential energy. Similarly, a stretched rubber band contains potential energy which, under certain conditions, can be converted into other forms of energy, such as kinetic energy.
Chemical bonds that form attractive forces between atoms also contain potential energy, called chemical energy. When a chemical reaction...
37.4K
P-N junction01:11

P-N junction

1.7K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
1.7K
Determination of Crystal Structures01:29

Determination of Crystal Structures

139
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
139
Carbon-dioxide Fixation01:28

Carbon-dioxide Fixation

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Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
885

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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

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一个基于无形碳的元结构,用于高效率和选择性太阳能吸收.

Junli Su1,2, Gang Chen1, Chong Ma1

  • 1Shanghai Key Laboratory of Optical Coatings and Spectral Modulation, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.

Nanomaterials (Basel, Switzerland)
|April 12, 2024
PubMed
概括

研究人员开发了一种新的无形碳 (a-C) 超材料吸收器,用于增强太阳能转换. 这种选择性吸收器在紫外线,可见光和近红外光中实现了高效率,这对于可再生能源应用至关重要.

关键词:
无形碳是一种无形的碳.宽带吸收宽带的吸收陶的纳米复合材料材料.准共振的空洞 准共振的空洞太阳能是太阳能中的一种.

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Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
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科学领域:

  • 材料科学 材料科学 材料科学
  • 可再生能源工程可再生能源工程
  • 纳米技术纳米技术

背景情况:

  • 高效的太阳能热转换对于可再生能源技术至关重要,如太阳能热发电,太阳能热光伏和海水淡化等.
  • 为了最大限度地提高太阳能转换效率的关键要求是具有精确定制光学性能的太阳能选择性吸收器.

研究的目的:

  • 提出和研究基于无形碳 (a-C) 超材料的宽带选择性吸收器.
  • 为了提高紫外 (UV),可见 (Vis) 和近红外 (NIR) 光谱范围的光吸收,以提高太阳能利用率.

主要方法:

  • 使用无形碳 (a-C) 超材料制造宽带选择性吸收器.
  • 将Ti@a-C薄膜纳入纳米结构以调节光学特性并增强NIR吸收.
  • 光学特性,太阳能吸收性和光热转换效率的表征.

主要成果:

  • 拟议的a-C元材料吸收器在UV,Vis和NIR光谱范围内显示出高吸收率.
  • Ti@a-C 薄膜显著增强了光吸收,特别是在 NIR 频段.
  • 取得了令人印象深刻的97.8%的太阳吸收率和95.6%的光热转换效率.
  • 吸收器保持了优越的性能,即使在大的入射角度和不同的极化状态下.

结论:

  • 开发的无形碳元材料作为有效的宽带选择性吸收器用于太阳能采集.
  • 金属兴奋剂,特别是Ti@a-C,提供了一种可行的策略来调整光学特性并提高NIR吸收.
  • 这些发现为太阳能应用中的无形碳矩阵材料提供了新的机会.